diff --git a/Source/Core/Core/DSP/DSPAssembler.cpp b/Source/Core/Core/DSP/DSPAssembler.cpp
index 25686013e0..b5ca9dd01b 100644
--- a/Source/Core/Core/DSP/DSPAssembler.cpp
+++ b/Source/Core/Core/DSP/DSPAssembler.cpp
@@ -46,7 +46,8 @@ static const char* err_string[] = {"",
                                    "Wrong parameter: must be accumulator register",
                                    "Wrong parameter: must be mid accumulator register",
                                    "Invalid register",
-                                   "Number out of range"};
+                                   "Number out of range",
+                                   "Program counter out of range"};
 
 DSPAssembler::DSPAssembler(const AssemblerSettings& settings)
     : m_cur_addr(0), m_cur_pass(0), m_current_param(0), settings_(settings)
@@ -61,11 +62,8 @@ bool DSPAssembler::Assemble(const std::string& text, std::vector<u16>& code,
 {
   if (line_numbers)
     line_numbers->clear();
-  const std::string file_name = "tmp.asm";
-  if (!File::WriteStringToFile(text, file_name))
-    return false;
   InitPass(1);
-  if (!AssembleFile(file_name, 1))
+  if (!AssemblePass(text, 1))
     return false;
 
   // We now have the size of the output buffer
@@ -75,7 +73,7 @@ bool DSPAssembler::Assemble(const std::string& text, std::vector<u16>& code,
   m_output_buffer.resize(m_totalSize);
 
   InitPass(2);
-  if (!AssembleFile(file_name, 2))
+  if (!AssemblePass(text, 2))
     return false;
 
   code = std::move(m_output_buffer);
@@ -752,18 +750,11 @@ void DSPAssembler::InitPass(int pass)
   segment_addr[SEGMENT_OVERLAY] = 0;
 }
 
-bool DSPAssembler::AssembleFile(const std::string& file_path, int pass)
+bool DSPAssembler::AssemblePass(const std::string& text, int pass)
 {
   int disable_text = 0;  // modified by Hermes
 
-  std::ifstream fsrc;
-  OpenFStream(fsrc, file_path, std::ios_base::in);
-
-  if (fsrc.fail())
-  {
-    std::cerr << "Cannot open file " << file_path << std::endl;
-    return false;
-  }
+  std::istringstream fsrc(text);
 
   // printf("%s: Pass %d\n", fname, pass);
   code_line = 0;
@@ -929,7 +920,9 @@ bool DSPAssembler::AssembleFile(const std::string& file_path, int pass)
           include_file_path = include_dir + '/' + params[0].str;
         }
 
-        AssembleFile(include_file_path, pass);
+        std::string included_text;
+        File::ReadFileToString(include_file_path, included_text);
+        AssemblePass(included_text, pass);
 
         code_line = this_code_line;
       }
@@ -952,9 +945,32 @@ bool DSPAssembler::AssembleFile(const std::string& file_path, int pass)
     if (strcmp("ORG", opcode) == 0)
     {
       if (params[0].type == P_VAL)
+      {
+        m_totalSize = std::max(m_cur_addr, params[0].val);
         m_cur_addr = params[0].val;
+      }
       else
+      {
         ShowError(ERR_EXPECTED_PARAM_VAL);
+      }
+      continue;
+    }
+
+    if (strcmp("WARNPC", opcode) == 0)
+    {
+      if (params[0].type == P_VAL)
+      {
+        if (m_cur_addr > params[0].val)
+        {
+          std::string msg = StringFromFormat("WARNPC at 0x%04x, expected 0x%04x or less",
+                                             m_cur_addr, params[0].val);
+          ShowError(ERR_OUT_RANGE_PC, msg.c_str());
+        }
+      }
+      else
+      {
+        ShowError(ERR_EXPECTED_PARAM_VAL);
+      }
       continue;
     }
 
@@ -1017,9 +1033,6 @@ bool DSPAssembler::AssembleFile(const std::string& file_path, int pass)
     m_totalSize += opcode_size;
   };
 
-  if (!failed)
-    fsrc.close();
-
   return !failed;
 }
 }  // namespace DSP
diff --git a/Source/Core/Core/DSP/DSPAssembler.h b/Source/Core/Core/DSP/DSPAssembler.h
index 1887de09e7..aab86f92e9 100644
--- a/Source/Core/Core/DSP/DSPAssembler.h
+++ b/Source/Core/Core/DSP/DSPAssembler.h
@@ -42,7 +42,8 @@ enum err_t
   ERR_WRONG_PARAMETER_ACC,
   ERR_WRONG_PARAMETER_MID_ACC,
   ERR_INVALID_REGISTER,
-  ERR_OUT_RANGE_NUMBER
+  ERR_OUT_RANGE_NUMBER,
+  ERR_OUT_RANGE_PC,
 };
 
 // Unless you want labels to carry over between files, you probably
@@ -91,7 +92,7 @@ private:
   u32 GetParams(char* parstr, param_t* par);
 
   void InitPass(int pass);
-  bool AssembleFile(const std::string& file_path, int pass);
+  bool AssemblePass(const std::string& text, int pass);
 
   void ShowError(err_t err_code, const char* extra_info = nullptr);
   // void ShowWarning(err_t err_code, const char *extra_info = nullptr);
diff --git a/docs/DSP/free_dsp_rom/dsp_rom.ds b/docs/DSP/free_dsp_rom/dsp_rom.ds
index bf1ee0c60f..b956aff65f 100644
--- a/docs/DSP/free_dsp_rom/dsp_rom.ds
+++ b/docs/DSP/free_dsp_rom/dsp_rom.ds
@@ -1,1169 +1,201 @@
-IROM_BASE:	equ 0x8000
-
-lri $CR, #0x00ff
-lri $SR, #0x2000
-si @DMBH, #0x8071
-si @DMBL, #0xfeed
-
-mainloop:
-	clr $ACC1
-	clr $ACC0
-	call wait_for_cpu_mbox+#IROM_BASE
-
-;mmem-addr	
-param1:
-	lr $AC1.M, @CMBL
-	lri $AC0.M, #0xa001
-	cmp
-	jnz param2+#IROM_BASE
-	call wait_for_cpu_mbox+#IROM_BASE
-	lr $IX0, @CMBH
-	lr $IX1, @CMBL
-	jmp mainloop+#IROM_BASE
-
-;iram-addr	
-param2:
-	lri $AC0.M, #0xc002
-	cmp
-	jnz param3+#IROM_BASE
-	call wait_for_cpu_mbox+#IROM_BASE
-	lr $IX2, @CMBL
-	jmp mainloop+#IROM_BASE
-
-;iram-length	
-param3:
-	lri $AC0.M, #0xa002
-	cmp
-	jnz param4+#IROM_BASE
-	call wait_for_cpu_mbox+#IROM_BASE
-	lr $IX3, @CMBL
-	jmp mainloop+#IROM_BASE
-
-;dram-length	
-param4:
-	lri $AC0.M, #0xb002
-	cmp
-	jnz param5+#IROM_BASE
-	call wait_for_cpu_mbox+#IROM_BASE
-	lr $AX0.L, @CMBL
-	jmp mainloop+#IROM_BASE	
-
-;iram-start-addr	
-param5:
-	lri $AC0.M, #0xd001
-	cmp
-	jnz mainloop+#IROM_BASE
-	call wait_for_cpu_mbox+#IROM_BASE
-	lr $AR0, @CMBL
-	jmp 0x80b5
-	
-wait_for_dsp_mbox:
-	lrs		$AC0.M, @DMBH
-	andcf	$AC0.M, #0x8000
-	jlz		wait_for_dsp_mbox+#IROM_BASE
-	ret
-
-wait_for_cpu_mbox:
-	lrs		$AC0.M, @CMBH
-	andcf	$AC0.M, #0x8000
-	jlnz	wait_for_cpu_mbox+#IROM_BASE
-	ret
-	
-wait_dma:
-	lrs		$AC0.M, @DSCR
-	andcf	$AC0.M, #0x0004
-	jlz		wait_dma+#IROM_BASE
-	ret
-	
-bootucode:	
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop	
-	nop	
-	nop	
-	nop	
-	nop	
-	nop	
-	nop	
-	nop		
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop	
-	nop	
-	nop	
-	nop	
-	nop	
-	nop	
-	nop	
-	nop		
-	nop		
-	nop		
-	nop		
-	nop		
-	nop		
-	nop		
-	nop		
-	nop		
-
-sub_80b5:
-	set16       
-	clr  $ACC1
-	clr  $ACC0
-	lris $AC0.M, #0x2
-	sr   @DSCR, $AC0.M
-	sr   @DSMAH, $IX0
-	sr   @DSMAL, $IX1
-	sr   @DSPA, $IX2
-	sr   @DSBL, $IX3
-	call wait_dma+#IROM_BASE
-	jmpr $AR0
-
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-
-; 80e7
-; Args:
-; AR0 points to the 32 input 1 samples (s16)
-; AR1 points to the volume data (init1, delta1, init2, delta2)
-; AR2 points to the already mixed samples for output 1 (s32)
-; AR3 points to where the output 1 should be stored (s32)
-; IX0 points to the 32 input 2 samples (s16)
-; IX1 points to where the output 2 should be stored (s32)
-;
-; Returns:
-; AX0.L is the value of the last sample from input 1
-; AX1.H is the value of the last sample from input 2
-mix_two_add:
-    call mix_add+#IROM_BASE
-    iar $AR1
-    mrr $AR0, $IX0
-    mrr $AR2, $IX1
-    mrr $AR3, $IX1
-    mrr $IX0, $AX0.L
-    call mix_add+#IROM_BASE
-    mrr $AX1.H, $AX0.L
-    mrr $AX0.L, $IX0
-    ret
-
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
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-    nop
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-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-
-; 81f9
-; Args:
-; AR0 points to the 32 input samples (s16)
-; AR1 points to the volume data (init, delta)
-; AR2 points to the already mixed samples (s32)
-; AR3 points to where the output should be stored (s32)
-;
-; Returns:
-; AX0.L is the value of the last sample
-; AX1.H is the first address after the output
-mix_add:
-    lrri $AX1.L, @$AR1
-    bloopi #32, ____mix_add_end_loop+#IROM_BASE
-        lrri $AC0.M, @$AR2
-        lrri $AC0.L, @$AR2
-        lsl16 $ACC0
-        lrri $AX0.H, @$AR0
-        mulx $AX0.H, $AX1.L
-        addp $ACC0
-        asr16 $ACC0
-        srri @$AR3, $AC0.M
-____mix_add_end_loop:
-        srri @$AR3, $AC0.L
-    movp $ACC0
-    mrr $AX0.L, $AC0.M
-    mrr $AX1.H, $AR3
-    ret
-
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-
-; 8282
-mix_two_add_ramp:
-    call mix_add_ramp+#IROM_BASE
-    mrr $AR0, $IX0
-    mrr $AR2, $IX1
-    mrr $IX1, $AX0.L
-    call mix_add_ramp+#IROM_BASE
-    mrr $AX1.H, $AX0.L
-    mrr $AX0.L, $IX1
-    ret
-
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
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-    nop
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-    nop
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-    nop
-    nop
-    nop
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-    nop
-    nop
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-    nop
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-    nop
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-    nop
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-    nop
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-    nop
-    nop
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-    nop
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-    nop
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-    nop
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-    nop
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-    nop
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-    nop
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-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
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-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
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-    nop
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-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
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-    nop
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-    nop
-    nop
-    nop
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-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
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-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
-    nop
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-
-; 845d
-mix_add_ramp:
-    clr $ACC0
-    clr $ACC1
-    lrri $AC0.L, @$AR1
-    lrrd $AC1.L, @$AR1
-    mrr $IX2, $AR3
-
-    bloopi #32, ____mix_add_ramp_end_ramp+#IROM_BASE
-        srri @$AR3, $AC0.L
-____mix_add_ramp_end_ramp:
-        add $ACC0, $ACC1
-
-    srri @$AR1, $AC0.L
-    iar $AR1
-    mrr $IX3, $AR1
-    mrr $AR1, $IX2
-    mrr $AR3, $AR2
-
-    bloopi #32, ____mix_add_ramp_end_loop+#IROM_BASE
-        lrri $AC0.M, @$AR2
-        lrri $AC0.L, @$AR2
-        lsl16 $ACC0
-        lrri $AX0.H, @$AR0
-        lrri $AX1.L, @$AR1
-        mulx $AX0.H, $AX1.L
-        addp $ACC0
-        asr16 $ACC0
-        srri @$AR3, $AC0.M
-____mix_add_ramp_end_loop:
-        srri @$AR3, $AC0.L
-    movp $ACC0
-    mrr $AX0.L, $AC0.M
-    mrr $AX1.H, $AR3
-    mrr $AR1, $IX3
-    mrr $AR3, $IX2
-    ret
+IROM_BASE:	equ 0x8000
+
+lri $CR, #0x00ff
+lri $SR, #0x2000
+si @DMBH, #0x8071
+si @DMBL, #0xfeed
+
+mainloop:
+	clr $ACC1
+	clr $ACC0
+	call wait_for_cpu_mbox+#IROM_BASE
+
+;mmem-addr
+param1:
+	lr $AC1.M, @CMBL
+	lri $AC0.M, #0xa001
+	cmp
+	jnz param2+#IROM_BASE
+	call wait_for_cpu_mbox+#IROM_BASE
+	lr $IX0, @CMBH
+	lr $IX1, @CMBL
+	jmp mainloop+#IROM_BASE
+
+;iram-addr
+param2:
+	lri $AC0.M, #0xc002
+	cmp
+	jnz param3+#IROM_BASE
+	call wait_for_cpu_mbox+#IROM_BASE
+	lr $IX2, @CMBL
+	jmp mainloop+#IROM_BASE
+
+;iram-length
+param3:
+	lri $AC0.M, #0xa002
+	cmp
+	jnz param4+#IROM_BASE
+	call wait_for_cpu_mbox+#IROM_BASE
+	lr $IX3, @CMBL
+	jmp mainloop+#IROM_BASE
+
+;dram-length
+param4:
+	lri $AC0.M, #0xb002
+	cmp
+	jnz param5+#IROM_BASE
+	call wait_for_cpu_mbox+#IROM_BASE
+	lr $AX0.L, @CMBL
+	jmp mainloop+#IROM_BASE
+
+;iram-start-addr
+param5:
+	lri $AC0.M, #0xd001
+	cmp
+	jnz mainloop+#IROM_BASE
+	call wait_for_cpu_mbox+#IROM_BASE
+	lr $AR0, @CMBL
+	jmp 0x80b5
+
+wait_for_dsp_mbox:
+	lrs		$AC0.M, @DMBH
+	andcf	$AC0.M, #0x8000
+	jlz		wait_for_dsp_mbox+#IROM_BASE
+	ret
+
+wait_for_cpu_mbox:
+	lrs		$AC0.M, @CMBH
+	andcf	$AC0.M, #0x8000
+	jlnz	wait_for_cpu_mbox+#IROM_BASE
+	ret
+
+wait_dma:
+	lrs		$AC0.M, @DSCR
+	andcf	$AC0.M, #0x0004
+	jlz		wait_dma+#IROM_BASE
+	ret
+
+bootucode:
+
+WARNPC 0xb5
+ORG 0xb5
+sub_80b5:
+	set16
+	clr  $ACC1
+	clr  $ACC0
+	lris $AC0.M, #0x2
+	sr   @DSCR, $AC0.M
+	sr   @DSMAH, $IX0
+	sr   @DSMAL, $IX1
+	sr   @DSPA, $IX2
+	sr   @DSBL, $IX3
+	call wait_dma+#IROM_BASE
+	jmpr $AR0
+
+WARNPC 0xe7
+ORG 0xe7
+; Args:
+; AR0 points to the 32 input 1 samples (s16)
+; AR1 points to the volume data (init1, delta1, init2, delta2)
+; AR2 points to the already mixed samples for output 1 (s32)
+; AR3 points to where the output 1 should be stored (s32)
+; IX0 points to the 32 input 2 samples (s16)
+; IX1 points to where the output 2 should be stored (s32)
+;
+; Returns:
+; AX0.L is the value of the last sample from input 1
+; AX1.H is the value of the last sample from input 2
+mix_two_add:
+    call mix_add+#IROM_BASE
+    iar $AR1
+    mrr $AR0, $IX0
+    mrr $AR2, $IX1
+    mrr $AR3, $IX1
+    mrr $IX0, $AX0.L
+    call mix_add+#IROM_BASE
+    mrr $AX1.H, $AX0.L
+    mrr $AX0.L, $IX0
+    ret
+
+WARNPC 0x1f9
+ORG 0x1f9
+; Args:
+; AR0 points to the 32 input samples (s16)
+; AR1 points to the volume data (init, delta)
+; AR2 points to the already mixed samples (s32)
+; AR3 points to where the output should be stored (s32)
+;
+; Returns:
+; AX0.L is the value of the last sample
+; AX1.H is the first address after the output
+mix_add:
+    lrri $AX1.L, @$AR1
+    bloopi #32, ____mix_add_end_loop+#IROM_BASE
+        lrri $AC0.M, @$AR2
+        lrri $AC0.L, @$AR2
+        lsl16 $ACC0
+        lrri $AX0.H, @$AR0
+        mulx $AX0.H, $AX1.L
+        addp $ACC0
+        asr16 $ACC0
+        srri @$AR3, $AC0.M
+____mix_add_end_loop:
+        srri @$AR3, $AC0.L
+    movp $ACC0
+    mrr $AX0.L, $AC0.M
+    mrr $AX1.H, $AR3
+    ret
+
+WARNPC 0x282
+ORG 0x282
+mix_two_add_ramp:
+    call mix_add_ramp+#IROM_BASE
+    mrr $AR0, $IX0
+    mrr $AR2, $IX1
+    mrr $IX1, $AX0.L
+    call mix_add_ramp+#IROM_BASE
+    mrr $AX1.H, $AX0.L
+    mrr $AX0.L, $IX1
+    ret
+
+WARNPC 0x45d
+ORG 0x45d
+mix_add_ramp:
+    clr $ACC0
+    clr $ACC1
+    lrri $AC0.L, @$AR1
+    lrrd $AC1.L, @$AR1
+    mrr $IX2, $AR3
+
+    bloopi #32, ____mix_add_ramp_end_ramp+#IROM_BASE
+        srri @$AR3, $AC0.L
+____mix_add_ramp_end_ramp:
+        add $ACC0, $ACC1
+
+    srri @$AR1, $AC0.L
+    iar $AR1
+    mrr $IX3, $AR1
+    mrr $AR1, $IX2
+    mrr $AR3, $AR2
+
+    bloopi #32, ____mix_add_ramp_end_loop+#IROM_BASE
+        lrri $AC0.M, @$AR2
+        lrri $AC0.L, @$AR2
+        lsl16 $ACC0
+        lrri $AX0.H, @$AR0
+        lrri $AX1.L, @$AR1
+        mulx $AX0.H, $AX1.L
+        addp $ACC0
+        asr16 $ACC0
+        srri @$AR3, $AC0.M
+____mix_add_ramp_end_loop:
+        srri @$AR3, $AC0.L
+    movp $ACC0
+    mrr $AX0.L, $AC0.M
+    mrr $AX1.H, $AR3
+    mrr $AR1, $IX3
+    mrr $AR3, $IX2
+    ret
+
+WARNPC 0x1000
+ORG 0x1000